Journal ArticleDOI
Effect of an electric field on the luminescence of GaAs quantum wells
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In this article, low-temperature photoluminescence (PL) measurements have been performed in narrow GaAs-${\mathrm{Ga}}_{1\ensuremath{-}x{Al}}_{x}\mathrm {As}$ quantum wells subject to an electric field perpendicular to the well plane, showing two peaks associated with exciton and free-electron-to-impurity recombination.Abstract:
Low-temperature photoluminescence (PL) measurements have been performed in narrow GaAs-${\mathrm{Ga}}_{1\ensuremath{-}x}{\mathrm{Al}}_{x}\mathrm{As}$ quantum wells subject to an electric field perpendicular to the well plane. At low fields the PL spectra show two peaks associated, respectively, with exciton and free-electron-to-impurity recombination. With increasing field the PL intensity decreases, with the excitonic structure decreasing at a much faster rate, and becomes completely quenched at a field of a few tens of kV/cm. This is accompanied by a shift in the peak position to lower energies. The results are interpreted as caused by the field-induced separation of carriers and modification of the quantum energies. Variational calculations performed for isolated, finite quantum wells explain qualitatively the experimental observations.read more
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Journal ArticleDOI
Electric field dependence of optical absorption near the band gap of quantum-well structures.
David A. B. Miller,Daniel S. Chemla,T. C. Damen,Arthur C. Gossard,W. Wiegmann,Thomas H. Wood,Charles A. Burrus +6 more
TL;DR: Detailed calculations of the shift of exciton peaks are presented including (i) exact solutions for single particles in infinite wells, (ii) tunneling resonance calculations for finite wells, and (iii) variational calculations ofexciton binding energy in a field.
Journal ArticleDOI
Linear and nonlinear optical properties of semiconductor quantum wells
TL;DR: In this paper, the experimental and theoretical investigations of the linear and nonlinear optical properties of semiconductor quantum well structures, including the effects of electrostatic fields, extrinsic carriers and real or virtual photocarriers, are reviewed.
Journal ArticleDOI
Electronic states in semiconductor heterostructures
Gérald Bastard,J.A. Brum +1 more
TL;DR: In this paper, the electronic energy levels of semiconductor heterostructures within the envelope function scheme were described and the Coulombic bound states in heterostructure (impurities, excitons) were discussed, and the effect of a static electric field on the carrier and exciton energy levels in semiconductor quantum wells.
Journal ArticleDOI
High‐speed optical modulation with GaAs/GaAlAs quantum wells in a p‐i‐n diode structure
Thomas H. Wood,C. A. Burrus,David A. B. Miller,Daniel S. Chemla,Theodoor C. Damen,Arthur C. Gossard,W. Wiegmann +6 more
TL;DR: In this paper, a new type of high-speed optical modulator is proposed and demonstrated, where an electric field is applied perpendicular to GaAs/GaAlAs multiple quantum well layers using a diode doping structure of 4μm total thickness.
Journal ArticleDOI
A bird's-eye view on the evolution of semiconductor superlattices and quantum wells
TL;DR: In this paper, significant milestones are presented with emphasis on experimental investigations in the device physics of reduced dimensionality performed in cooperation with the materials science of heteroepitaxial growth.